Please find my comments below,
* in subject, you said: 4.1 but tagged comment as 4.2
it is a 4.2 version.
* why you are using openLDAP?
we are using default ldap server.
* "just restarted it but it coming to online after restarted it"
after restart the gluu server, we unable to reach the url https://ipaddress/identity, getting “503. That's an error.The service you requested is not available at this time.Please try later again.”
* what Gluu server bits you are using? ( oxtrust, oxauth, shibboleth, casa etc )
I’m not sure about it.
* how much memory & resources you have?
Mem=4G CPU=2, HDD=70G